matrix-sdk: Don't panic when importing invalid key exports

matrix_sdk/src/client.rs

@@ -129,6 +129,7 @@ use ruma::{
 #[cfg(feature = "encryption")]
 use crate::{
     device::{Device, UserDevices},
+    error::RoomKeyImportError,
     verification::{QrVerification, SasVerification, Verification, VerificationRequest},
 };
 use crate::{
@@ -2491,8 +2492,12 @@ impl Client {
     /// ```
     #[cfg(all(feature = "encryption", not(target_arch = "wasm32")))]
     #[cfg_attr(feature = "docs", doc(cfg(all(encryption, not(target_arch = "wasm32")))))]
-    pub async fn import_keys(&self, path: PathBuf, passphrase: &str) -> Result<(usize, usize)> {
-        let olm = self.base_client.olm_machine().await.ok_or(Error::AuthenticationRequired)?;
+    pub async fn import_keys(
+        &self,
+        path: PathBuf,
+        passphrase: &str,
+    ) -> StdResult<(usize, usize), RoomKeyImportError> {
+        let olm = self.base_client.olm_machine().await.ok_or(RoomKeyImportError::StoreClosed)?;
         let passphrase = Zeroizing::new(passphrase.to_owned());
 
         let decrypt = move || {
@@ -2501,8 +2506,7 @@ impl Client {
         };
 
         let task = tokio::task::spawn_blocking(decrypt);
-        // TODO remove this unwrap.
-        let import = task.await.expect("Task join error").unwrap();
+        let import = task.await.expect("Task join error")?;
 
         Ok(olm.import_keys(import, |_, _| {}).await?)
     }

matrix_sdk/src/error.rs

@@ -18,7 +18,9 @@ use std::io::Error as IoError;
 
 use http::StatusCode;
 #[cfg(feature = "encryption")]
-use matrix_sdk_base::crypto::{CryptoStoreError, DecryptorError, MegolmError, OlmError};
+use matrix_sdk_base::crypto::{
+    CryptoStoreError, DecryptorError, KeyExportError, MegolmError, OlmError,
+};
 use matrix_sdk_base::{Error as SdkBaseError, StoreError};
 use reqwest::Error as ReqwestError;
 use ruma::{
@@ -151,6 +153,33 @@ pub enum Error {
     Url(#[from] UrlParseError),
 }
 
+/// Error for the room key importing functionality.
+#[cfg(feature = "encryption")]
+#[cfg_attr(feature = "docs", doc(cfg(encryption)))]
+#[derive(Error, Debug)]
+pub enum RoomKeyImportError {
+    /// An error de/serializing type for the `StateStore`
+    #[error(transparent)]
+    SerdeJson(#[from] JsonError),
+
+    /// The cryptostore isn't yet open, logging in is required to open the
+    /// cryptostore.
+    #[error("The cryptostore hasn't been yet opened, can't import yet.")]
+    StoreClosed,
+
+    /// An IO error happened.
+    #[error(transparent)]
+    Io(#[from] IoError),
+
+    /// An error occurred in the crypto store.
+    #[error(transparent)]
+    CryptoStore(#[from] CryptoStoreError),
+
+    /// An error occurred while importing the key export.
+    #[error(transparent)]
+    Export(#[from] KeyExportError),
+}
+
 impl Error {
     /// Try to destructure the error into an universal interactive auth info.
     ///